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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    
</body>
<script>
    // 1.call
    const liu = {
        name:'德华',
        sing(song){
            console.log(`${this.name}会动听的歌曲-${song}`);
        }
    }
    liu.sing('恭喜发财')
    
    const xu = {
        name:'徐俊大'
    }
    liu.sing.call(xu,'我是徐俊大')

</script>
</html>